CN103249206A - LED lamp - Google Patents
LED lamp Download PDFInfo
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- CN103249206A CN103249206A CN2012100289629A CN201210028962A CN103249206A CN 103249206 A CN103249206 A CN 103249206A CN 2012100289629 A CN2012100289629 A CN 2012100289629A CN 201210028962 A CN201210028962 A CN 201210028962A CN 103249206 A CN103249206 A CN 103249206A
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Abstract
An LED (light-emitting diode) lamp comprises a main control module, a drive module, an LED light source module and a temperature sensor module, wherein the temperature sensor module detects the real-time temperature of the LED light source module and sends the real-time temperature to the main control module; the main control module compares the real-time temperature with the temperature corresponding to the set color temperature value to obtain the temperature change condition and give out a control signal for adjusting the current inputted to the LED light source module; and the drive module receives a processed analog signal and adjusts the current inputted to the LED light source module to adjust the color temperature value of the LED light source module to the set color temperature value. The LED lamp solves the color temperature drift caused by temperature increase during the operation process of the LED lamp.
Description
[technical field]
The present invention relates to field of light fittings, particularly relate to a kind of LED light fixture.
[background technology]
Semiconductor lighting is one of the green illumination light source of tool development prospect of 21 century.It has advantages such as energy-saving and environmental protection and life-span length, has complied with the trend of era development, causes global great attention.Along with improving constantly and the maturation of high-power LED encapsulation and application technology of LED (semiconductor light-emitting-diode) chip and packaging technology level, the luminous efficiency of LED is greatly improved.Led light source all has comparative advantage in each side such as energy-saving and environmental protection and long-lives at present.Along with the raising of quality of life, people improve constantly the illumination environment requirement, and led light source can provide comfortable lighting environment for people.
Lighting environment has direct influence to human boby biorhythm.Studies show that lighting source has tangible influence to Human Physiology and psychology, suitable adjusting lighting environment, can improve the people to the comfort level of lighting environment sensation, avoid because of the Human Physiology that is not suitable for causing of lighting environment or the discomfort of psychology.The colour temperature of lighting source has a direct impact biological rhythm and people's mood, and the light source of high colour temperature can improve the brain activity, allows people's attentiveness concentrate, but is unfavorable for the recovery of brain fag.The high color temperature light source irradiation has a kind of sombre atmosphere to people down; Low color temperature light sources irradiation has a kind of sultry sensation to people down.
Traditional led light source can be adjusted the colour temperature of lighting source by the luminous intensity distribution ratio of adjusting the LED modules with different colors light source.But, the LED light fixture in use, the rising of the temperature of led light source can cause the colour temperature of led light source to drift about, and makes the colour temperature of lighting source depart from predefined color temperature value, thereby the people is done not feel like oneself or accelerates eye fatigue.
[summary of the invention]
Based on this, be necessary to provide a kind of LED light fixture that effectively prevents the colour temperature drift.
A kind of LED light fixture, comprise main control module, driver module, led light source module and temperature sensor module, described temperature sensor module detects the real time temperature of described led light source module and is sent to main control module, the temperature that described main control module is corresponding with setting color temperature value with described real time temperature compares, and draws and send according to temperature variations the control signal of the described led light source blocks current of adjustment input; Described driver module receives handles the electric current that described led light source module is imported in described control signal adjustment, with the color temperature value of adjusting described led light source module to setting color temperature value.
In a preferred embodiment, described main control module comprises control chip and memory cell, and described memory cell is used for the corresponding relation of storage led light source module temperature and color temperature value; Described control chip compares by the temperature that draws described setting color temperature value correspondence in the described memory cell and with described real time temperature, draws temperature variations.
In a preferred embodiment, described driver module comprises light modulation driver element and constant current driving unit, and described light modulation driver element links to each other with described main control module with described constant current driving unit; Described led light source module comprises red LED light source, blue led light source and White LED light source, and described light modulation driver element links to each other with the blue led light source with the red LED light source, is used to described red LED light source and blue led light source that adjustable electric current is provided; Described constant current driving unit links to each other with described White LED light source, is used to described White LED light source that constant electric current is provided.
In a preferred embodiment, described control chip adopts the MSP430 chip; Described memory cell adopts EEPROM; Described light modulation driver element adopts the current feedback regulating circuit that stabling current can be provided for described red LED light source and blue led light source.
In a preferred embodiment, described memory cell also is used for the red LED light source of storage LED light fixture correspondence under different-colour and the luminous intensity distribution ratio of blue led light source; Described control chip by the luminous intensity distribution ratio that draws described setting color temperature value correspondence in the described memory cell, sends the instruction of control led light source module according to setting color temperature value, makes the color temperature value of led light source module for setting color temperature value.
In a preferred embodiment, also comprise the infrared remote control module, described infrared remote control module is used for user's remote control and selects color temperature value and send infrared signal; Described control chip receives to be handled described infrared signal and draws the setting color temperature value, and according to described setting color temperature value by drawing the luminous intensity distribution ratio in the described memory cell.
In a preferred embodiment; described main control module comprises the high temperature protection unit; the maximum temperature that default described led light source module allows in the described high temperature protection unit is sent the signal of closing described led light source module when being used for the temperature that detects in described temperature sensor module greater than described maximum temperature.
In a preferred embodiment, described temperature sensor module comprises thermocouple and thermocouple amplifier chip, and described thermocouple is surveyed the temperature of described led light source module, transfers to described main control module after described thermocouple amplifier chip is handled.
In a preferred embodiment, also comprise the charactron display module, described charactron display module links to each other with described main control module, the color temperature value when being used for showing the real work of led light source module.
In a preferred embodiment, described main control module adopts PID control, is input variable with the temperature of setting the color temperature value correspondence, and the real time temperature that detects with described temperature sensor module is that feedback quantity carries out PID control.
In the above-mentioned LED light fixture, temperature sensor module detects the real time temperature of led light source module and is sent to main control module, the temperature that main control module is corresponding with setting color temperature value with real time temperature compares, draw and send according to temperature variations the control signal of adjustment input led light source blocks current, by driver module driving LED light source module, the color temperature value of led light source module is transferred to the setting color temperature value, effectively solved because the colour temperature drift that Yin Wendu rises and causes in the LED light fixture course of work.
[description of drawings]
Fig. 1 is the module map of the LED light fixture of preferred embodiment of the present invention;
Fig. 2 is the detailed block diagram of main control module among Fig. 1;
Fig. 3 is the detailed block diagram of LED light fixture among Fig. 1.
[embodiment]
In order to solve the drift of traditional LED light fixture colour temperature, and the more single problem of setting of colour temperature, proposed a kind ofly to prevent the colour temperature drift and have the selectable LED light fixture of multiple colour temperature.
As Fig. 1, Fig. 2 and shown in Figure 3, the LED light fixture of preferred embodiment of the present invention comprises main control module 110, driver module 120, led light source module 130 and temperature sensor module 140.Temperature sensor module 140 detects the real time temperature of led light source module 130 and is sent to main control module 110, the temperature that main control module 110 is corresponding with setting color temperature value with real time temperature compares, and draws and send according to temperature variations the control signal of adjustment input led light source module 130 electric currents.Driver module 120 receives the electric current of the control signal adjustment input led light source module 130 that the main control module 110 handled sends, with the color temperature value of adjusting led light source module 130 to setting color temperature value.The temperature detection end of temperature sensor module 140 is installed on the substrate of LED light fixture, reflects the real time temperature of LED light fixture by the temperature that detects this substrate.
In the above-mentioned LED light fixture, temperature sensor module 140 detects the real time temperature of led light source module 130 and is sent to main control module 110, the temperature that main control module 110 is corresponding with setting color temperature value with real time temperature compares, draw and send according to temperature variations the control signal of adjustment input led light source module 130 electric currents, by driver module 120 driving LED light source modules 130, make the color temperature value of led light source module 130 transfer to the setting color temperature value, effectively solved because the colour temperature drift that Yin Wendu rises and causes in the LED light fixture course of work.
In the present embodiment, main control module 110 comprises control chip 112 and memory cell 114.Memory cell 114 is used for the corresponding relation of storage led light source module 130 temperature and color temperature value.Control chip 112 draws the variation of temperature situation by drawing the temperature corresponding with setting color temperature value in the gentle storage unit 114 and comparing with real time temperature.For LED, its luminous can corresponding peak wavelength when the strongest.The luminous peak wavelength of LED can make light color or colour temperature change.Along with the rising of temperature, the luminous peak wavelength of LED can change.The variation of considering colour temperature is that the variation by peak wavelength causes, and variations in temperature can cause the variation of peak wavelength, so set up a temperature that is suitable for for the specific LED light fixture of certain money and the corresponding relation of color temperature value by experiment, and the corresponding relation of this temperature and color temperature value deposited in the memory cell 114 of main control module 110.By the temperature sensor module 140 real-time real time temperatures of gathering on the substrate, feed back in the main control module 110, obtain setting the corresponding temperature of color temperature value by temperature and the corresponding relation of color temperature value, after the corresponding temperature of then real time temperature and user being wanted to set of setting color temperature value compares, adjust the electric current of input led light source module 130, with the color temperature value of adjusting led light source module 130 to setting color temperature value, color temperature value when finally making the work of LED light fixture is stable, can the colour temperature drift not take place because the back temperature that works long hours rises.
In the present embodiment, driver module 120 comprises light modulation driver element 122 and constant current driving unit 124.Light modulation driver element 122 links to each other with main control module 110 with constant current driving unit 124.Led light source module 130 comprises red LED light source 132, blue led light source 134 and White LED light source 136.Light modulation driver element 132 links to each other with blue led light source 134 with red LED light source 132, is used to red LED light source 132 and blue led light source 134 that adjustable electric current is provided.Constant current driving unit 124 links to each other with White LED light source 136, is used to White LED light source 136 that constant electric current is provided.Main control module 110 sends the control signal of the electric current of adjusting input red LED light source 132 and blue led light source 134, adjusts the electric current of input red LED light source 132 and blue led light source 134 by light modulation driver element 122, and then adjusts the color temperature value of LED light fixture.Main control module 110 sends the control signal of closing or light White LED light source, drives White LED light source 136 by constant current driving unit 124.
In the present embodiment, control chip 112 adopts MSP430 chip (mixed-signal processor).The MSP430 chip is the MSP430F169 chip of the MSP430 series of Texas Instrument, and this chip has super low-power consumption, working stability, disturbed little, the I/O aboundresources, easy to operate, and can be directly digital-to-analogue conversion function number by output pin go out advantages such as analog signal.Use this chip can reduce the complexity of peripheral chip greatly, realize the Highgrade integration of master control borad.Memory cell adopts EEPROM (Electrically Erasable Programmable Read Only Memory), and EEPROM (Electrically Erasable Programmable Read Only Memo) is the storage chip that data are not lost after a kind of power down.So as above characteristics based on EEPROM, relatively be applicable to embedded system, be that data are not lost after the power down, and the data of wherein storing generally need not change, i.e. during program operation as long as read the good data of prior storage from corresponding position by control.What EEPROM specifically adopted is AT24C256 (CATALYST company is now by ON corporate buyout).AT24C02 is the serial CMOS E2PROM of a 256K position, and 32768 octets are contained in inside.This device has a special write-protect function by the iic bus interface line operate of going forward side by side that links to each other with main control module.Light modulation driver element 122 adopts the current feedback regulating circuit that stabling current can be provided for red LED light source 132 and blue led light source 134.So that the electric current under specific input signal keeps stable.Light modulation driver element 122 is realized the output of constant current based on operational amplifier and transistor by current feedback, keeps stable so that import the electric current of red LED light source 132 and blue led light source 134.Constant current driving unit 124 drives chip BP2808 for LED.
In the present embodiment, memory cell 114 also is used for the red LED light source 132 of storage LED light fixture correspondence under different-colour and the luminous intensity distribution ratio of blue led light source 134.Control chip 112 by drawing the luminous intensity distribution ratio of setting the color temperature value correspondence in the memory cell 114, sends the instruction of control led light source module 130 according to setting color temperature value, makes the color temperature value of led light source module 130 for setting color temperature value.Based on the stable white light source that White LED light source 136 provides, adjust the color temperature value of whole LED light fixture by the luminous intensity distribution ratio of adjusting red LED light source 132 and blue led light source 134.
In the present embodiment, the LED light fixture also comprises infrared remote control module 150.Infrared remote control module 150 is used for user's remote control and selects color temperature value and send infrared signal.Main control module 110 receives to be handled these infrared signals and draws the setting color temperature value, and according to this setting color temperature value by drawing the luminous intensity distribution ratio in the memory cell.In control chip 112, write the code of infrared reception decoding, after the infrared signal decoding to input, the setting color temperature value of identification user input.The user can make things convenient for and realize accurately the selection of 21600K, 3000K, 3500K, 4000K, 4500K, 5000K, 51600K and eight kinds of colour temperatures of 6500K by infrared remote control module 150.
In the present embodiment, main control module 110 comprises the high temperature protection unit.The maximum temperature that default led light source module 130 allows in the high temperature protection unit is sent the signal of closing led light source module 130 when being used for the temperature that detects in temperature sensor module 140 greater than maximum temperature.The setting of high temperature protection unit; can when the luminance temperature of LED light fixture is too high, close light fixture timely; treat that temperature decline back user can light the LED light fixture again; asthenopia or the too high user's body that causes of substrate temperature of having avoided the Yin Sewen skew to cause are burnt, and have protected that the user's is healthy.
In the present embodiment, temperature sensor module 140 comprises thermocouple and thermocouple amplifier chip.Thermocouple is surveyed the temperature of led light source module 130, transfers to main control module 110 after the thermocouple amplifier chip is handled.
In the present embodiment, the LED light fixture also comprises charactron display module 160.Charactron display module 160 links to each other with main control module 110, the color temperature value when being used for showing 130 real works of led light source module.
In the present embodiment, main control module 110 adopts PID control (proportion integration differentiation control), is input variable with the temperature of setting the color temperature value correspondence, and the real time temperature that detects with described temperature sensor module is that feedback quantity carries out PID control.
The above embodiment has only expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (10)
1. LED light fixture, it is characterized in that, comprise main control module, driver module, led light source module and temperature sensor module, described temperature sensor module detects the real time temperature of described led light source module and is sent to main control module, the temperature that described main control module is corresponding with setting color temperature value with described real time temperature compares, and draws and send according to temperature variations the control signal of the described led light source blocks current of adjustment input; Described driver module receives handles the electric current that described led light source module is imported in described control signal adjustment, with the color temperature value of adjusting described led light source module to setting color temperature value.
2. LED light fixture according to claim 1 is characterized in that, described main control module comprises control chip and memory cell, and described memory cell is used for the corresponding relation of storage led light source module temperature and color temperature value; Described control chip compares by the temperature that draws described setting color temperature value correspondence in the described memory cell and with described real time temperature, draws temperature variations.
3. LED light fixture according to claim 2 is characterized in that, described driver module comprises light modulation driver element and constant current driving unit, and described light modulation driver element links to each other with described main control module with described constant current driving unit; Described led light source module comprises red LED light source, blue led light source and White LED light source, and described light modulation driver element links to each other with the blue led light source with the red LED light source, is used to described red LED light source and blue led light source that adjustable electric current is provided; Described constant current driving unit links to each other with described White LED light source, is used to described White LED light source that constant electric current is provided.
4. LED light fixture according to claim 3 is characterized in that, described control chip adopts the MSP430 chip; Described memory cell adopts EEPROM; Described light modulation driver element adopts the current feedback regulating circuit that stabling current can be provided for described red LED light source and blue led light source.
5. LED light fixture according to claim 3 is characterized in that, described memory cell also is used for the red LED light source of storage LED light fixture correspondence under different-colour and the luminous intensity distribution ratio of blue led light source; Described control chip by the luminous intensity distribution ratio that draws described setting color temperature value correspondence in the described memory cell, sends the instruction of control led light source module according to setting color temperature value, makes the color temperature value of led light source module for setting color temperature value.
6. LED light fixture according to claim 5 is characterized in that, also comprises the infrared remote control module, and described infrared remote control module is used for user's remote control and selects color temperature value and send infrared signal; Described control chip receives to be handled described infrared signal and draws the setting color temperature value, and according to described setting color temperature value by drawing the luminous intensity distribution ratio in the described memory cell.
7. LED light fixture according to claim 1; it is characterized in that; described main control module comprises the high temperature protection unit; the maximum temperature that default described led light source module allows in the described high temperature protection unit is sent the signal of closing described led light source module when being used for the temperature that detects in described temperature sensor module greater than described maximum temperature.
8. LED light fixture according to claim 1, it is characterized in that, described temperature sensor module comprises thermocouple and thermocouple amplifier chip, and described thermocouple is surveyed the temperature of described led light source module, transfers to described main control module after described thermocouple amplifier chip is handled.
9. LED light fixture according to claim 1 is characterized in that, also comprises the charactron display module, and described charactron display module links to each other with described main control module, the color temperature value when being used for showing the real work of led light source module.
10. according to any described LED light fixture in the claim 1 to 9, it is characterized in that, described main control module adopts PID control, is input variable with the temperature of setting the color temperature value correspondence, and the real time temperature that detects with described temperature sensor module is that feedback quantity carries out PID control.
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| CN2012100289629A CN103249206A (en) | 2012-02-09 | 2012-02-09 | LED lamp |
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| CN2012100289629A CN103249206A (en) | 2012-02-09 | 2012-02-09 | LED lamp |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103747584A (en) * | 2014-01-08 | 2014-04-23 | 深圳市朗恒电子有限公司 | Illumination control circuit and illumination device |
| CN103900050A (en) * | 2014-04-01 | 2014-07-02 | 广东美的暖通设备有限公司 | Lamp with color temperature capable of being changed according to moods of person and method for controlling lamp |
| CN105263246A (en) * | 2015-11-27 | 2016-01-20 | 董旭 | Remotely-controlled night lamp |
| CN105517227A (en) * | 2015-12-20 | 2016-04-20 | 合肥艾斯克光电科技有限责任公司 | LED lamp over-temperature protection method |
| WO2017024556A1 (en) * | 2015-08-12 | 2017-02-16 | 北京莱斯达电子科技有限公司 | Lighting effect adjustable led spotlight |
| CN107124793A (en) * | 2017-05-23 | 2017-09-01 | 合肥众耀信息科技有限公司 | A kind of intelligent residential district lighting driving system with adaptive dimming function |
| CN108302338A (en) * | 2018-01-23 | 2018-07-20 | 深圳市国华光电科技有限公司 | A kind of color LED intelligent lamp |
| CN109041324A (en) * | 2018-06-08 | 2018-12-18 | 珠海金晟照明科技有限公司 | The color temperature adjusting method of lamps and lanterns, lighting system and lamps and lanterns |
| CN110191537A (en) * | 2019-05-27 | 2019-08-30 | 常州星宇车灯股份有限公司 | Car light overheat protector system, the vehicle with it and car light excess temperature protection method |
| CN112735324A (en) * | 2019-10-15 | 2021-04-30 | 杭州海康威视数字技术股份有限公司 | LED display screen control method and device |
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| CN103747584A (en) * | 2014-01-08 | 2014-04-23 | 深圳市朗恒电子有限公司 | Illumination control circuit and illumination device |
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| CN103900050A (en) * | 2014-04-01 | 2014-07-02 | 广东美的暖通设备有限公司 | Lamp with color temperature capable of being changed according to moods of person and method for controlling lamp |
| WO2017024556A1 (en) * | 2015-08-12 | 2017-02-16 | 北京莱斯达电子科技有限公司 | Lighting effect adjustable led spotlight |
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| CN108302338B (en) * | 2018-01-23 | 2021-01-05 | 深圳市国华光电科技有限公司 | Colored LED intelligence lamp |
| CN109041324A (en) * | 2018-06-08 | 2018-12-18 | 珠海金晟照明科技有限公司 | The color temperature adjusting method of lamps and lanterns, lighting system and lamps and lanterns |
| CN110191537A (en) * | 2019-05-27 | 2019-08-30 | 常州星宇车灯股份有限公司 | Car light overheat protector system, the vehicle with it and car light excess temperature protection method |
| CN112735324A (en) * | 2019-10-15 | 2021-04-30 | 杭州海康威视数字技术股份有限公司 | LED display screen control method and device |
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Application publication date: 20130814 |